CBSE Class 8 Maths MCQs on Laws of Exponents and Power Rules (NCERT Practice Questions)
CBSE Class 8 Maths MCQs on Laws of Exponents and Power Rules (NCERT Practice Questions)
Class: 8
Subject: Mathematics
Chapter 2: Power Play
Topic: Laws of Exponents & Power Rules
Board: CBSE (Based on Latest NCERT Curriculum)
These MCQs are strictly designed as per the CBSE curriculum based on NCERT books and are ideal for Class 8 Mathematics examination standard.
Subject: Mathematics
Chapter 2: Power Play
Topic: Laws of Exponents & Power Rules
Board: CBSE (Based on Latest NCERT Curriculum)
These MCQs are strictly designed as per the CBSE curriculum based on NCERT books and are ideal for Class 8 Mathematics examination standard.
1. Simplify: 2³ × 2⁴
Answer: A) 2⁷
When bases are same, add exponents: 2³ × 2⁴ = 2^(3+4) = 2⁷.
When bases are same, add exponents: 2³ × 2⁴ = 2^(3+4) = 2⁷.
2. Simplify: 5⁶ ÷ 5²
Answer: B) 5⁴
Divide powers with same base: subtract exponents → 5^(6-2) = 5⁴.
Divide powers with same base: subtract exponents → 5^(6-2) = 5⁴.
3. (3²)³ =
Answer: B) 3⁶
Power of a power: multiply exponents → 3^(2×3) = 3⁶.
Power of a power: multiply exponents → 3^(2×3) = 3⁶.
4. 7⁰ =
Answer: B) 1
Any non-zero number raised to power 0 equals 1.
Any non-zero number raised to power 0 equals 1.
5. Simplify: (2 × 3)²
Answer: D) Both A and B
(2×3)² = 6² = 2²×3².
(2×3)² = 6² = 2²×3².
6. Simplify: 10³ × 10²
Answer: A) 10⁵
Add exponents: 3+2=5.
Add exponents: 3+2=5.
7. Simplify: 8⁴ ÷ 8⁴
Answer: C) 1
Same exponents subtract → 8⁰ = 1.
Same exponents subtract → 8⁰ = 1.
8. (-2)³ =
Answer: C) -8
Odd power keeps negative sign.
Odd power keeps negative sign.
9. (-3)² =
Answer: B) 9
Even power makes result positive.
Even power makes result positive.
10. 4³ =
Answer: C) 64
4×4×4=64.
4×4×4=64.
11. 9² =
Answer: C) 81
9×9=81.
9×9=81.
12. 3⁴ =
Answer: C) 81
3×3×3×3=81.
3×3×3×3=81.
13. 2⁵ =
Answer: A) 32
2×2×2×2×2=32.
2×2×2×2×2=32.
14. 100 = 10?
Answer: B) 2
10² = 100.
10² = 100.
15. 1000 = 10?
Answer: B) 3
10³ = 1000.
10³ = 1000.
16. 5¹ =
Answer: C) 5
Any number raised to power 1 equals itself.
Any number raised to power 1 equals itself.
17. (2² × 2³) =
Answer: A) 2⁵
Add exponents: 2+3=5.
Add exponents: 2+3=5.
18. 6⁰ =
Answer: B) 1
Any non-zero number to power 0 equals 1.
Any non-zero number to power 0 equals 1.
19. (4³)² =
Answer: B) 4⁶
Multiply exponents: 3×2=6.
Multiply exponents: 3×2=6.
20. 2³ × 3³ =
Answer: A) 6³
aⁿ × bⁿ = (ab)ⁿ.
aⁿ × bⁿ = (ab)ⁿ.
